Strain is defined as ratio of
Consider the following stress-strain diagram and match the following:
List - I
List - II
1. Hard rubber
2. Soft rubber
3. Structural steel
4. Aluminium alloy
Young's modulus is defined as the ratio of
The linear relationship between stress and strain for a bar in simple tension or compression can be expressed by the equation
in which Eis a constant of proportionality known as modulus of elasticity for the material. The modulus of elasticity is the slope of the stress- strain diagram in the linearly elastic region and its value depends upon the particular material being used.
Match List-I (Material) with List-ll (Young’s modulus):
The permanent mode of deformation of a material known as ____________
Plasticity is defined as the property of a material due to which it is permanently deformed due to loading. Elasticity is the temporary form of deformation. Twinning and Slip are mechanisms of Plastic deformation.
A thin mid steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under
Match List-1 (Materia!) with List-ll (Poisson’s Ratio)
During a tensile test on a specimen of 1 cm2 cross-section, maximum load observed was 80 kN and area of cross-section at neck was 0.5 cm2. UTS of specimen is
= 800 MPa
A prismatic bar of circular cross-section is loaded by tensile forces P= 90 kN. The bar has length L = 3 m and diameter d = 30 mm. If is made of aluminium with modulus of elasticity E = 70 GPa and Poisson’s ratio v = 1/3. What is the increase in volume ΔV of the bar?
Resilience of a material is considered when it is subjected to
Resilience represent the ability of the material to absorb energy within the elastic range.